from django.contrib.sites.models import Site
from django.conf import settings
from django_cas.backends import CASBackend

class COFCASBackend(CASBackend):
    def authenticate(self, ticket, service):
        """Authenticates CAS ticket and retrieves user data"""
        user = super(COFCASBackend, self).authenticate(ticket, service)
        profile = user.get_profile()
        if not profile.login_clipper:
            profile.login_clipper = user.username
            profile.save()
        if not user.email:
            user.email = settings.CAS_EMAIL_FORMAT % profile.login_clipper
            user.save()
        return user

def context_processor (request):
    '''Append extra data to the context of the given request'''
    data = {
            "user": request.user,
            "site": Site.objects.get_current(),
           }
    return data